Somewhat related is the PicoROM developed by Martin Donlon of MiSTerFPGA fame. "PicoROM an 8-bit ROM emulator in a DIP-32 compatible form factor. It's main use

Somewhat related is the PicoROM developed by Martin Donlon of MiSTerFPGA fame. "PicoROM an 8-bit ROM emulator in a DIP-32 compatible form factor. It's main use case (the reason I made it) is for rapid iteration when experimenting with arcade hardware. The PicoROM can emulate ROMs up to 2MBit (256Kbytes) in size and speeds of 100ns." Rather that flash an EPROM, you connect via USB to the Pico to upload your code. You can use multiple PicoROMs in a design if need be. https://github.com/wickerwaka/PicoROM https://github.com/wickerwaka/PicoROM